21048201216 has 728 divisors, whose sum is σ = 77351872320. Its totient is φ = 5589762048.

The previous prime is 21048201203. The next prime is 21048201221. The reversal of 21048201216 is 61210284012.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 21048201216.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 397135846 + ... + 397135898.

Almost surely, 2^21048201216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21048201216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38675936160).

21048201216 is an abundant number, since it is smaller than the sum of its proper divisors (56303671104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21048201216 is an frugal number, since it uses more digits than its factorization.

21048201216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

Adding to 21048201216 its reverse (61210284012), we get a palindrome (82258485228).

The spelling of 21048201216 in words is "twenty-one billion, forty-eight million, two hundred one thousand, two hundred sixteen".